CN107200574B - 一种低损耗软磁铁氧体材料 - Google Patents

一种低损耗软磁铁氧体材料 Download PDF

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CN107200574B
CN107200574B CN201710340640.0A CN201710340640A CN107200574B CN 107200574 B CN107200574 B CN 107200574B CN 201710340640 A CN201710340640 A CN 201710340640A CN 107200574 B CN107200574 B CN 107200574B
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magnetic ferrite
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CN107200574A (zh
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瞿德林
王久如
王晓祥
李丛俊
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Zhongde Electronics Co ltd
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Abstract

本发明公开了一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.8‑0.9份，助剂6‑8份；主料的原料按摩尔份包括：Fe2O3 56‑58份，MnO 30‑33份，ZnO 8‑9份，NiO 3‑4份；辅料的原料按重量份包括：CaO 2.5‑3.5份，V2O5 0.8‑1.2份，SnO2 0.9‑1.1份，TiO2 0.25‑0.35份，Co2O3 0.5‑1份，Nb2O5 0.15‑0.25份，MoO3 0.9‑1.1份，Bi2O3 0.2‑0.4份，Ta2O5 0.3‑0.5份。本发明具有高频、高起始磁导率、低损耗的性能。

Description

一种低损耗软磁铁氧体材料
技术领域
本发明涉及铁氧体材料技术领域，尤其涉及一种低损耗软磁铁氧体材料。
背景技术
随着人们节能减排意识的不断增强，节能开关电源被广泛应用，其变压器磁心的工作频率范围也越来越高，其磁心是铁氧体材料，但是用于高频范围的铁氧体材料其功率损耗较高，这样会大大降低其使用寿命。
发明内容
本发明提出了一种低损耗软磁铁氧体材料，本发明具有高频、高起始磁导率、低损耗的性能。
本发明提出的一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.8-0.9份，助剂6-8份；
主料的原料按摩尔份包括：Fe2O3 56-58份，MnO 30-33份，ZnO 8-9份，NiO 3-4份；
辅料的原料按重量份包括：CaO 2.5-3.5份，V2O5 0.8-1.2份，SnO2 0.9-1.1份，TiO2 0.25-0.35份，Co2O3 0.5-1份，Nb2O5 0.15-0.25份，MoO3 0.9-1.1份，Bi2O3 0.2-0.4份，Ta2O5 0.3-0.5份。
优选地，助剂的原料按重量份包括：聚乙烯醇13-17份，十六烷基三甲基溴化铵0.5-0.7份，聚二甲基硅氧烷0.1-0.3份，硬脂酸镁0.6-0.8份，水75-85份。
优选地，其原料按重量份包括：主料100份，辅料0.85份，助剂7份。
优选地，主料的原料按摩尔份包括：Fe2O3 57份，MnO 31份，ZnO 8.5份，NiO 3.5份。
优选地，在低损耗软磁铁氧体材料的制备过程中，取主料进行一次湿磨，再预烧得到的预烧料；向预烧料中加入辅料进行二次湿磨，接着加入助剂造粒，装入模具中压制成型，然后烧结得到低损耗软磁铁氧体材料。
优选地，一次湿磨的时间为1-2h，二次湿磨的时间6.5-7.5h。
优选地，预烧的温度为900-920℃，时间为2.5-3h。
优选地，压制成型的压力为7-8MPa。
优选地，烧结温度为1340-1350℃，烧结时间为2.5-3h，烧结时的氧分压为5％。
本发明通过调整主料Fe2O3、MnO、ZnO、NiO的摩尔配比，调节本发明的微观结构，使得本发明具有较高的起始磁导率、饱和磁通密度和较低的高频功率损耗；同时添加合适含量的辅料CaO、V2O5、SnO2、TiO2、Co2O3、Nb2O5、MoO3、Bi2O3、Ta2O5相互配合，Nb2O5在软磁铁氧体的晶界处形成偏析，增加晶界电阻率，从而大大降低本发明的损耗；V2O5、Bi2O3、SnO2的熔点较低，在烧结时形成液相，可促进TiO2、Co2O3固溶于软磁铁氧体的尖晶石结构中，加速固溶速度，提高本发明的密度，减少内部气孔，从而进一步降低损耗，并能与Ta2O5、MoO3相互配合，细化晶粒，增大截止频率，增大起始磁导率和饱和磁通密度；并加入合适含量的助剂可有效改善性能，使产品结晶均匀，减少晶粒间、晶界间的气孔，进一步降低本发明的损耗；并配合合适工艺流程和参数，使得各物质均匀分散，并通过设定合适的预烧和烧结条件与各物质相互配合，大大降低本发明的高频功率损耗。
具体实施方式
实施例1
一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.85份，助剂7份；
主料的原料按摩尔份包括：Fe2O3 57份，MnO 31份，ZnO 8.5份，NiO 3.5份；
辅料的原料按重量份包括：CaO 3份，V2O5 1份，SnO2 1份，TiO2 0.3份，Co2O3 0.7份，Nb2O5 0.2份，MoO3 1份，Bi2O3 0.3份，Ta2O5 0.4份。
实施例2
一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.8份，助剂8份；
主料的原料按摩尔份包括：Fe2O3 56份，MnO 33份，ZnO 8份，NiO 4份；
辅料的原料按重量份包括：CaO 2.5份，V2O5 1.2份，SnO2 0.9份，TiO2 0.35份，Co2O3 0.5份，Nb2O5 0.25份，MoO3 0.9份，Bi2O3 0.4份，Ta2O5 0.3份；
助剂的原料按重量份包括：聚乙烯醇17份，十六烷基三甲基溴化铵0.5份，聚二甲基硅氧烷0.3份，硬脂酸镁0.6份，水85份。
实施例3
一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.9份，助剂6份；
主料的原料按摩尔份包括：Fe2O3 58份，MnO 30份，ZnO 9份，NiO 3份；
辅料的原料按重量份包括：CaO 3.5份，V2O5 0.8份，SnO2 1.1份，TiO2 0.25份，Co2O3 1份，Nb2O5 0.15份，MoO3 1.1份，Bi2O3 0.2份，Ta2O5 0.5份；
助剂的原料按重量份包括：聚乙烯醇13份，十六烷基三甲基溴化铵0.7份，聚二甲基硅氧烷0.1份，硬脂酸镁0.8份，水75份；
在低损耗软磁铁氧体材料的制备过程中，取主料一次湿磨2h，再调节温度为900℃，预烧3h得到的预烧料；向预烧料中加入辅料二次湿磨6.5h，接着加入助剂造粒，装入模具中，调节压力为8MPa压制成型，然后调节温度为1340℃，调节氧分压为5％，烧结3h得到低损耗软磁铁氧体材料。
实施例4
一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.82份，助剂7.5份；
主料的原料按摩尔份包括：Fe2O3 56.5份，MnO 32份，ZnO 8.2份，NiO 3.8份；
辅料的原料按重量份包括：CaO 2.7份，V2O5 1.1份，SnO2 0.95份，TiO2 0.33份，Co2O3 0.6份，Nb2O5 0.22份，MoO3 0.95份，Bi2O3 0.35份，Ta2O5 0.35份；
助剂的原料按重量份包括：聚乙烯醇16份，十六烷基三甲基溴化铵0.55份，聚二甲基硅氧烷0.25份，硬脂酸镁0.65份，水82份；
在低损耗软磁铁氧体材料的制备过程中，取主料一次湿磨1h，再调节温度为920℃，预烧2.5h得到的预烧料；向预烧料中加入辅料二次湿磨7.5h，接着加入助剂造粒，装入模具中，调节压力为7MPa压制成型，然后调节温度为1350℃，调节氧分压为5％，烧结2.5h得到低损耗软磁铁氧体材料。
实施例5
一种低损耗软磁铁氧体材料，其原料按重量份包括：主料100份，辅料0.88份，助剂6.5份；
主料的原料按摩尔份包括：Fe2O3 57.5份，MnO 32.5份，ZnO 8.8份，NiO 3.2份；
辅料的原料按重量份包括：CaO 3.3份，V2O5 0.9份，SnO2 1.05份，TiO2 0.27份，Co2O3 0.8份，Nb2O5 0.18份，MoO3 1.05份，Bi2O3 0.25份，Ta2O5 0.45份；
助剂的原料按重量份包括：聚乙烯醇14份，十六烷基三甲基溴化铵0.65份，聚二甲基硅氧烷0.15份，硬脂酸镁0.75份，水78份；
在低损耗软磁铁氧体材料的制备过程中，取主料一次湿磨1.5h，再调节温度为910℃，预烧2.7h得到的预烧料；向预烧料中加入辅料二次湿磨7h，接着加入助剂造粒，装入模具中，调节压力为7.5MPa压制成型，然后调节温度为1345℃，调节氧分压为5％，烧结2.7h得到低损耗软磁铁氧体材料。
将实施例1-5中所述低损耗软磁铁氧体材料进行性能测试，测试结果如下：
Figure BDA0001293292710000051
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。

Claims (4)

1.一种低损耗软磁铁氧体材料，其特征在于，其原料按重量份包括：主料100份，辅料0.8-0.9份和助剂6-8份；
主料的原料按摩尔份包括：Fe2O3 56-58份，MnO 30-33份，ZnO 8-9份和NiO 3-4份；
辅料的原料按重量份包括：CaO 2.5-3.5份，V2O5 0.8-1.2份，SnO2 0.9-1.1份，TiO20.25-0.35份，Co2O3 0.5-1份，Nb2O5 0.15-0.25份，MoO3 0.9-1.1份，Bi2O3 0.2-0.4份和Ta2O5 0.3-0.5份；
在低损耗软磁铁氧体材料的制备过程中，取主料进行一次湿磨，再预烧得到的预烧料；向预烧料中加入辅料进行二次湿磨，接着加入助剂造粒，装入模具中压制成型，然后烧结得到低损耗软磁铁氧体材料；
一次湿磨的时间为1-2h，二次湿磨的时间6.5-7.5h；
预烧的温度为900-920℃，时间为2.5-3h；
压制成型的压力为7-8MPa；
烧结温度为1340-1350℃，烧结时间为2.5-3h，烧结时的氧分压为5%。
2.根据权利要求1所述低损耗软磁铁氧体材料，其特征在于，助剂的原料按重量份包括：聚乙烯醇13-17份，十六烷基三甲基溴化铵0.5-0.7份，聚二甲基硅氧烷0.1-0.3份，硬脂酸镁0.6-0.8份和水75-85份。
3.根据权利要求1或2所述低损耗软磁铁氧体材料，其特征在于，其原料按重量份包括：主料100份，辅料0.85份和助剂7份。
4. 根据权利要求1或2所述低损耗软磁铁氧体材料，其特征在于，主料的原料按摩尔份包括：Fe2O3 57份，MnO 31份，ZnO 8.5份和NiO 3.5份。
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